998
+998 is the international calling code for Uzbekistan.
- Even
- Composite
Where 998 fits
Why 998 is special
Uzbekistan is one of only two doubly landlocked countries in the world — every neighbour is itself landlocked.
998 is part of
Factors & digit properties
- Divisors (4)
- 1, 2, 499, 998
- Prime factorisation
- 2 × 499
- Digit sum
- 26
- Digital root
- 8
Representations
- Decimal
- 998
- Scientific notation
- 9.980 × 10^2
Roman numerals
C M X C V I I I
CMXCVIII uses the subtractive pair XC: ten before a hundred — a hundred minus ten.
Binary
1 1 1 1 1 0 0 1 1 0
1 × 512 + 1 × 256 + 1 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 998
Octal
1 7 4 6
1 × 512 + 7 × 64 + 4 × 8 + 6 × 1 = 998
Hexadecimal
3 e 6
3 × 256 + e × 16 + 6 × 1 = 998
Read as powers of two: 512 + 256 + 128 + 64 + 32 + 4 + 2 = 998.
In historical numeral systems
Egyptian
9 coils of rope, 9 hobbles, 8 strokes
9 × 100 + 9 × 10 + 8 × 1 = 998. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 6 vertical wedges (sixties place), 3 corner wedges + 8 vertical wedges (units place)
16 × 60 + 38 = 998. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
sampi, then koppa, then eta, marked as a numeral
sampi-koppa-eta + keraia
sampi + koppa + eta written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
tav, then tav, then qof, then tsadi, then het
tav-tav-qof-tsadi-het
tav (400) + tav (400) + qof (100) + tsadi (90) + het (8) = 998, written in descending order.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Deficient number
- Happy number
- Semiprime
Related numbers & connections
Tajikistan and Uzbekistan are Central Asian neighbours. Uzbekistan is one of only two doubly landlocked countries on Earth.
View 992 →Nearby in a sequence
- is adjacent to992
why?
Strength 0.50, confidence "high".
Geography
+998 reaches Uzbekistan, one of two doubly landlocked countries: reaching an ocean requires crossing at least two borders. Liechtenstein is the other.
DocumentedGeographyGeography: Uzbekistan
Common questions
Is 998 a prime number?
No, 998 is not prime.
What are the factors of 998?
The factors of 998 are 1, 2, 499, 998.
What is 998 in Roman numerals?
998 in Roman numerals is CMXCVIII. XC is subtractive: ten before a hundred — a hundred minus ten. Written additively it would be DCCCCLXXXXVIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026